Generator control arrangement

Claim 1

IN A GENERATOR CONTROL INSTALLATION, IN COMBINATION A GENERATOR HAVING A SHUNT EXCITER WINDING CONNECTED IN ITS EXCITER CIRCUIT; FIRST VOLTAGE DIVIDER MEANS CONNECTED WITH THE GENERATOR OUTPUT FOR SUPPLYING A FIRST CONTROL VOLTAGE BEING A PREDETERMINED FRACTION OF THE GENERATOR OUTPUT VOLTAGE; SECOND VOLTAGE DIVIDER MEANS CONNECTED WITH THE GENERATOR OUTPUT FOR SUPPLYING A SECOND CONTROL VOLTAGE BEING A PREDETERMINED FRACTION OF THE GENERATOR OUTPUT VOLTAGE; REGULATING SEMI-CONDUCTOR MEANS CONNECTED IN SAID EXCITER CIRCUIT FOR MAINTAINING, THROUGH EXCITER REGULATION, SAID GENERATOR OUTPUT VOLATGE AT A PREDETERMINED SUBSTANTIALLY UNIFORM LEVEL, SAID REGULATING MEANS INCLUDING AN AMPLIFYING TRANSISTOR DEVICE HAVING AN EMITTER-COLLECTOR CIRCUIT IN SERIES WITH SAID EXCITER WINDING AND A BASE ELECTRODE CONNECTED WITH SAID FIRST VOLTAGE DIVIDER MEANS, AND THUS BEING RESPONSIVE TO SAID FIRST CONTROL VOLTAGE SO AS TO RAPIDLY INCREASE THE EXCITER CURRENT UPON AN INCREASE OF SAID GENERATOR OUTPUT VOLTAGE WITHIN THE RANGE BELOW SAID PREDETERMINED LEVEL, AND A NON-LINEAR SEMI-CONDUCTOR DEVICE CAPABLE OF PRODUCING A RESISTIVE SPACE CHARGE IN SAID TRANSISTOR DEVICE AND CONNECTED WITH SAID SECOND VOLTAGE DIVIDER MEANS, SAID SEMI-CONDUCTOR DEVICE BEING RESPONSIVE TO SAID SECOND CONTROL VOLTAGE SO AS TO DECREASE THE EXCITER CURRENT CONTROLLED BY SAID TRANSISTOR DEVICE, THROUGH THE RESISTIVE ACTION OF SAID SPACE CHARGE UPON AN INCREASE OF SAID GENERATOR OUTPUT VOLTAGE BEYOND SAID PREDETERMINED LEVEL.